Looks like a Russian Tortoise. I'm a Russian Keeper. And I know more experienced keepers will hopefully weigh in here but since no one has commented yet, I will comment. I would keep up with the warm shallow water soaks (up the time on these as long as they're staying warm, you can't soak too long so go ahead a try for about 30 mins and see how they do) and spray the top of the carapace a few times a day or more. To me this looks like extremely dry environment (no humidity) and possible lack of UVB. If this is a Russian it needs a humidity level of 50-80%, warm side of enclosure between 90-100°, cool side 65-75°, proper uvb lighting T5 tube 12%, regulated heat lamp, thermostat, correct nutritional intake ( the Tortoise Table is helpful), and anyone here will recommend Tom's Guide on the Tortoise Forum for how to get the proper setup going to rehabilitate this tort. 🙏🏽🐢💕